Across
- 3. Cl
- 4. Al
- 6. Sr
- 9. Co
- 11. Mo
- 15. Ra
- 16. P
- 20. symbol for Radium
- 21. Pb
- 22. B
- 23. Do, Re, Me, Fa, ___, La, Ti, Do
- 25. Rn
- 28. Ca
- 29. He
- 34. I
- 35. Rb
- 37. O
- 39. Ne
- 40. Cu
Down
- 1. Ag
- 2. C
- 5. Ni
- 7. U
- 8. As
- 10. H
- 12. Ar
- 13. N
- 14. Au
- 16. symbol for lead
- 17. Si
- 18. Hg
- 19. Na
- 24. symbol for sodium
- 26. Os
- 27. symbol for americium
- 30. Fe
- 31. Zn
- 32. Sn
- 33. symbol for magnesium
- 36. symbol for Zinc
- 38. symbol for ytterbium
- 41. symbol for Plutonium
